[src/trunk]: src/usr.bin/sed add -u (unbuffered output) after GNU sed.

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/37830d3a8ab1
branches:  trunk
changeset: 330013:37830d3a8ab1
user:      christos <christos%NetBSD.org@localhost>
date:      Tue Jun 17 16:39:02 2014 +0000

description:
add -u (unbuffered output) after GNU sed.

diffstat:

 usr.bin/sed/main.c |  23 +++++++++++++++++------
 usr.bin/sed/sed.1  |   8 +++++---
 2 files changed, 22 insertions(+), 9 deletions(-)

diffs (94 lines):

diff -r 8892665bb8e5 -r 37830d3a8ab1 usr.bin/sed/main.c
--- a/usr.bin/sed/main.c        Tue Jun 17 15:37:40 2014 +0000
+++ b/usr.bin/sed/main.c        Tue Jun 17 16:39:02 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: main.c,v 1.24 2014/06/06 12:46:54 joerg Exp $  */
+/*     $NetBSD: main.c,v 1.25 2014/06/17 16:39:02 christos Exp $       */
 
 /*-
  * Copyright (c) 2013 Johann 'Myrkraverk' Oskarsson.
@@ -39,7 +39,7 @@
 #endif
 
 #include <sys/cdefs.h>
-__RCSID("$NetBSD: main.c,v 1.24 2014/06/06 12:46:54 joerg Exp $");
+__RCSID("$NetBSD: main.c,v 1.25 2014/06/17 16:39:02 christos Exp $");
 #ifdef __FBSDID
 __FBSDID("$FreeBSD: head/usr.bin/sed/main.c 252231 2013-06-26 04:14:19Z pfg $");
 #endif
@@ -137,7 +137,7 @@
        fflag = 0;
        inplace = NULL;
 
-       while ((c = getopt(argc, argv, "EI::ae:f:i::lnr")) != -1)
+       while ((c = getopt(argc, argv, "EI::ae:f:i::lnru")) != -1)
                switch (c) {
                case 'r':               /* Gnu sed compat */
                case 'E':
@@ -177,6 +177,16 @@
                case 'n':
                        nflag = 1;
                        break;
+               case 'u':
+#ifdef _IONBF
+                       c = setvbuf(stdout, NULL, _IONBF, 0);
+#else
+                       c = -1;
+                       errno = EOPNOTSUPP;
+#endif
+                       if (c)
+                               warn("setting unbuffered output failed");
+                       break;
                default:
                case '?':
                        usage();
@@ -208,9 +218,10 @@
 static void
 usage(void)
 {
-       (void)fprintf(stderr, "%s\n%s\n",
-               "usage: sed script [-Ealn] [-i extension] [file ...]",
-               "       sed [-Ealn] [-i extension] [-e script] ... [-f script_file] ... [file ...]");
+       (void)fprintf(stderr,
+           "Usage: %s script [-Ealnu] [-i[<extension>]] [file ...]\n"
+           "\t%s [-Ealnu] [-i[<extension>]] [-e script] ... [-f script_file]"
+           " ... [file ...]\n", getprogname(), getprogname());
        exit(1);
 }
 
diff -r 8892665bb8e5 -r 37830d3a8ab1 usr.bin/sed/sed.1
--- a/usr.bin/sed/sed.1 Tue Jun 17 15:37:40 2014 +0000
+++ b/usr.bin/sed/sed.1 Tue Jun 17 16:39:02 2014 +0000
@@ -1,4 +1,4 @@
-.\"    $NetBSD: sed.1,v 1.34 2014/06/06 14:36:38 christos Exp $
+.\"    $NetBSD: sed.1,v 1.35 2014/06/17 16:39:02 christos Exp $
 .\" Copyright (c) 1992, 1993
 .\"    The Regents of the University of California.  All rights reserved.
 .\"
@@ -32,7 +32,7 @@
 .\"    @(#)sed.1       8.2 (Berkeley) 12/30/93
 .\" $FreeBSD: head/usr.bin/sed/sed.1 259132 2013-12-09 18:57:20Z eadler $
 .\"
-.Dd December 9, 2013
+.Dd June 17, 2014
 .Dt SED 1
 .Os
 .Sh NAME
@@ -40,7 +40,7 @@
 .Nd stream editor
 .Sh SYNOPSIS
 .Nm
-.Op Fl Ealnr
+.Op Fl Ealnru
 .Ar command
 .Op Ar
 .Nm
@@ -149,6 +149,8 @@
 Same as
 .Fl E
 for compatibility with GNU sed.
+.It Fl u
+Make output unbuffered.
 .El
 .Pp
 The form of a